diff --git a/YYModel/NSObject+YYModel.m b/YYModel/NSObject+YYModel.m
index 3d7c470..17ed091 100644
--- a/YYModel/NSObject+YYModel.m
+++ b/YYModel/NSObject+YYModel.m
@@ -1062,9 +1062,9 @@ static void ModelSetValueForProperty(__unsafe_unretained id model,
                 
             case YYEncodingTypeBlock: {
                 if (isNull) {
-                    ((void (*)(id, SEL, void (^)()))(void *) objc_msgSend)((id)model, meta->_setter, (void (^)())NULL);
+                    ((void (*)(id, SEL, void (^)(void)))(void *) objc_msgSend)((id)model, meta->_setter, (void (^)(void))NULL);
                 } else if ([value isKindOfClass:YYNSBlockClass()]) {
-                    ((void (*)(id, SEL, void (^)()))(void *) objc_msgSend)((id)model, meta->_setter, (void (^)())value);
+                    ((void (*)(id, SEL, void (^)(void)))(void *) objc_msgSend)((id)model, meta->_setter, (void (^)(void))value);
                 }
             } break;